<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>购物车</title>
	<%-- 静态包含头部信息--%>
	<%@include file="/pages/common/header.jsp"%>

	<%-- 给删除添加单击事件， 确认是否删除 --%>
	<script type="text/javascript">
		$(function () {
			$("a.deleteItem").click(function () {
				return confirm("确定删除" + $(this).parent().parent().find("td:first").text() + "吗？" );
			})

			$("#clearItem").click(function () {
				return confirm("确定清空购物车吗？");
			})

			// 给输入框绑定 onchange内容发生改变事件
			$("input.updateCount").change(function () {
				// 获取商品名称
				var name = $(this).parent().parent().find("td:first").text();
				var id = $(this).attr('bookId');
				// 获取商品数量
				var count = this.value;
				if (confirm("你确定要将【" + name + "】商品修改数量为：" + count + " 吗?")) {
					//发起请求。给服务器保存修改
					location.href = "http://localhost:8080/book/cartServlet?action=updateCount&count=" + count + "&id=" + id;
				} else {
					// defaultValue属性是表单项Dom对象的属性。它表示默认的value属性值。
					this.value = this.defaultValue;
				}
			})
		})
	</script>
</head>
<body>
	
	<div id="header">
			<img class="logo_img" alt="" src="static/img/logo.gif" >
			<span class="wel_word">购物车</span>
			<%--静态包含登录成功之后的重复页面部分--%>
			<%@ include file="/pages/common/welcome.jsp"%>
	</div>
	
	<div id="main">
	
		<table>
			<tr>
				<td>商品名称</td>
				<td>数量</td>
				<td>单价</td>
				<td>金额</td>
				<td>操作</td>
			</tr>

			<%-- 购物车为空 --%>
			<c:if test="${empty sessionScope.cart.items}">
				<tr>
					<td colspan="5"> <a href="index.jsp" >爱好学习的你，快去选择商品吧！！！</a></td>
				</tr>
			</c:if>

			<%-- 购物车不为空 --%>
			<c:if test="${not empty sessionScope.cart.items}">
				<%-- 从 session 域中获取 购物车 信息，并遍历输出 --%>
				<c:forEach items="${sessionScope.cart.items}" var="entry">
					<tr>
						<td>${entry.value.name}</td>
						<td>
							<input class="updateCount" style="width: 80px;"
								   bookId="${entry.value.id}"
								   type="text" value="${entry.value.count}">
						</td>
						<td>${entry.value.price}</td>
						<td>${entry.value.totalPrice}</td>
						<td><a class="deleteItem" href="cartServlet?action=deleteItem&id=${entry.value.id}">删除</a></td>
					</tr>
				</c:forEach>
			</c:if>
		</table>

		<c:if test="${not empty sessionScope.cart.items}">
			<div class="cart_info">
				<span class="cart_span">购物车中共有<span class="b_count">${sessionScope.cart.totalCount}</span>件商品</span>
				<span class="cart_span">总金额<span class="b_price">${sessionScope.cart.totalPrice}</span>元</span>
				<span class="cart_span"><a id="clearItem" href="cartServlet?action=clearItem">清空购物车</a></span>
				<span class="cart_span"><a href="orderServlet?action=createOrder">去结账</a></span>
			</div>
		</c:if>
	</div>

	<%--静态包含页脚信息--%>
	<%@include file="/pages/common/footer.jsp"%>
</body>
</html>